WO2019156516A1

WO2019156516A1 - Wave force generation system and controlling method therefor

Info

Publication number: WO2019156516A1
Application number: PCT/KR2019/001613
Authority: WO
Inventors: 성용준; 김종윤
Original assignee: 주식회사 인진
Priority date: 2018-02-12
Filing date: 2019-02-11
Publication date: 2019-08-15
Also published as: AU2019217162B2; CA3090929A1; EP3754177A1; ZA202004983B; CN111742135B; CN111742135A; EP3754177A4; AU2019217162A1; JP7044892B2; CA3090929C; EP3754177B1; JP2021514443A; PT3754177T; DK3754177T3; KR102027554B1; US20210010451A1; KR20190097641A

Abstract

Disclosed are a wave force generation system for producing electric energy by a hydraulic circuit and a controlling method. The wave force generation system comprises a power conversion portion including a hydraulic cylinder which generates a hydraulic pressure by six degrees-of-freedom motion of a moving object floating on waves, wherein: when force is applied to the hydraulic cylinder in one direction thereof, the power conversion portion makes a fluid flow along a first path so as to produce electric energy; and when force is applied to the hydraulic cylinder in the other direction thereof, the power conversion portion makes the fluid flow through second path which makes the fluid bypass and flow in a direction opposite to the first path, whereby the fluid in the second path meets the first path and thus can produce electric energy.

Description

Wave Power Generation System and Control Method thereof

The following description relates to a wave power generation system and a method of controlling the system.

In general, power generation methods for generating electricity include hydropower, thermal power generation, nuclear power generation, etc. These power generation methods require large-scale power generation facilities. In addition, in the case of thermal power generation, a huge amount of oil or coal energy must be supplied in order to operate a power plant, and thus, many difficulties are anticipated at the present time when oil and coal resources are depleted, and pollution is a big problem. have. In addition, in the case of nuclear power generation, radioactive leakage and nuclear waste treatment have serious problems. In the case of hydroelectric power generation, since there is a drop in water, large-scale dams must be constructed, which not only causes changes in the surrounding environment, but also causes environmental constraints such as construction of a river with abundant water resources. . Therefore, a revolutionary power generation method that is cheaper, safer, and more environmentally friendly than such a general power generation method is required, and one of them is wave power generation capable of producing electric energy using wave movement.

Attention has been drawn to tidal power generating electric energy using tidal-difference and tidal power generating electric energy using fast flow of sea water and wave power generating electric energy using wave movement. In particular, wave power generation is a technology for producing electrical energy by using the continuously generated wave movement, it is possible to continuously produce energy. The wave power generation converts the periodic vertical motion of the sea surface caused by waves and the forward and backward motion of water particles into mechanical rotational motion or axial motion through an energy converter, and then into electrical energy. The wave power generation method can be classified into various types according to the method of firstly converting the energy according to the height of the crest and the representative one, and the generator is operated as the buoy floating on the water moves up or down by the wave movement. There is an animal-like way.

In the case of a pseudo-animal type, a method of generating an object moving according to the movement of a wave, for example, a buoy, is generated through a generator after converting it into a reciprocating or rotational motion, for example, Korean Patent Publication No. 10- 2015-00120896 or Japanese Patent No. 5260092 is disclosed.

However, because irregular kinetic energy is provided due to the characteristics of the waves, in order to produce energy stably using this, the kinetic transmission unit for transmitting wave energy and the power conversion unit for converting the received kinetic energy into rotational kinetic energy used for power generation are provided. There is a need for systems and control methods that can produce effective electrical energy.

Descriptions of the background art described above are held or acquired by the inventors in the process of deriving the present invention, and are not necessarily to be regarded as known technologies disclosed to the general public before the application of the present invention.

According to the embodiments, to improve the energy conversion efficiency, and to provide a control system and method of a wave power plant having a high degree of freedom of control.

Problems to be solved in the embodiments are not limited to the above-mentioned problems, and other tasks not mentioned will be clearly understood by those skilled in the art from the following description.

According to embodiments for achieving the above-mentioned problem, the wave power generation system includes a power converter including a hydraulic cylinder for generating a hydraulic pressure by six degrees of freedom movement of the animal body floating in the wave, The converting unit generates electrical energy by flowing a fluid along a first path when a force is applied to the hydraulic cylinder in one direction, and when the force is applied in the other direction to the hydraulic cylinder, the fluid in a direction opposite to the first path. By flowing the fluid through a second path that bypasses the flow, but joins the first path to produce electrical energy.

According to one side, it can be configured to include a plurality of tension transmitting members connected to three or more locations of the animal body. The tension transmitting member includes a first driving unit and a restoring force transmitting unit for driving the hydraulic cylinder, the tension transmitting member applies a force to the hydraulic cylinder in one direction when tension is applied, and the restoring force transmitting unit is the tension transmitting member. When the tension is released from the hydraulic cylinder may be provided to apply a force in the other direction. The first driving unit converts the movement of the tension transmitting member into a reciprocating linear motion to transmit a force to the hydraulic cylinder. For example, the first driving unit may include a rack gear and a pinion gear.

According to one side, the restoring force transmission unit, to drive the first drive in the direction opposite to the tension transfer member, a second drive unit connected to the tension transfer member, and an elastic unit driven by the second drive unit; Can be. For example, the elastic part may include any one or more of a gas spring, a pneumatic spring, a hydraulic spring. The second driving unit may include a rack gear and a pinion gear.

According to one side, the first driving unit and the restoring force transmission unit may be provided in each of the plurality of tension transfer member.

On the other hand, according to other embodiments for achieving the above-described problem, the wave power generation system, floating in the waves, the animal moving by the wave, the six degrees of freedom of the animal is connected to enable the movement of the animal body A motion transmission unit including a tension transmission member for transmitting kinetic energy of the first drive unit connected to the tension transmission member, a hydraulic cylinder generating hydraulic pressure by the first driving unit, and a hydraulic pressure generated by the hydraulic cylinder A hydraulic motor driven by the hydraulic converter, a power converting unit including a hydraulic circuit for connecting fluid to the hydraulic cylinder and the hydraulic motor, and connected to the tension transmitting member, wherein the tension is applied to the hydraulic cylinder through the first driving unit. And a restoring force transmission unit for generating hydraulic pressure in a direction opposite to the transmission member.

According to one side, when the tension is applied to the tension transmission member, the force is applied to the hydraulic cylinder in one direction, and when the tension is released from the tension transmission member by the force applied from the restoring force transmission unit It may be provided to apply a force in the other direction to the hydraulic cylinder. For example, the first driving unit may include a rack gear and a pinion gear.

According to one side, the restoring force transmission unit, it may be configured to include an elastic portion and a second driving portion provided to apply a force to the first drive in the direction opposite to the tension transfer member. For example, the elastic part may include any one or more of a gas spring, a pneumatic spring, a hydraulic spring. The second driving unit may include a rack gear and a pinion gear.

According to one side, the hydraulic circuit, the first path through which the fluid flows to drive the hydraulic motor when the force is applied to the hydraulic cylinder in one direction and the fluid is applied when the force is applied in the other direction to the hydraulic cylinder It may include a second path for flowing between one end and the other end of the hydraulic cylinder. The second path may be formed such that electrical energy is produced by the hydraulic motor through the first path by introducing the fluid discharged from the other direction into the hydraulic cylinder to the first path. Alternatively, the second path may be formed to circulate the fluid between the other end and one end of the hydraulic cylinder without introducing the fluid into the first path.

On the other hand, according to the embodiments for achieving the above-described problem, the control method of the wave power generation system, the power converter through the tension transmission member to the six degrees of freedom kinetic energy of the floating animal moving by the waves while floating in the waves In the step of transmitting to the power transmission unit, when the tension is applied to the tension transmission member to generate the hydraulic pressure in one direction, when the tension is released from the tension transmission member to generate the hydraulic pressure in the other direction and the one direction and the other And producing each of the electrical energy by the hydraulic pressure generated in the direction.

According to one side, the step of generating the hydraulic pressure, the tension transfer member for driving the hydraulic cylinder, and when the tension is released from the tension transfer member in the direction opposite to the tension transfer member in the first drive unit A restoring force transmission unit for applying a force is provided, and when a force is applied to the hydraulic cylinder in one direction, the fluid flows along a first path, and when the force is applied in the other direction to the hydraulic cylinder by the restoring force transmission unit, the hydraulic cylinder Between the other end and one end of the fluid may be bypassed with the first path and flow along the second path.

As seen above, according to the embodiments, it is possible to improve the power generation efficiency according to the movement of the animal body using the hydraulic circuit.

In addition, when a disturbance such as a sudden movement occurs, by bypassing the generator without operating, it is possible to prevent abnormality in the wave power generation system due to the disturbance.

Effects of the wave power generation system and the control method according to an embodiment are not limited to those mentioned above, other effects that are not mentioned will be clearly understood by those skilled in the art from the following description.

The following drawings attached to this specification are illustrative of the preferred embodiment of the present invention, and together with the detailed description of the present invention serves to further understand the technical spirit of the present invention, the present invention is limited to the matters described in such drawings It should not be construed as limited.

1 is a conceptual diagram of a wave power generation system according to an embodiment.

2 is a conceptual diagram illustrating a configuration of a power converter in a wave power generation system according to an exemplary embodiment.

3 and 4 are views for explaining the operation of the power converter of FIG.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even if they are shown in different drawings. In addition, in describing the embodiment, when it is determined that the detailed description of the related well-known configuration or function interferes with the understanding of the embodiment, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but between components It will be understood that may be "connected", "coupled" or "connected".

Hereinafter, a wave power generation system 10 according to embodiments will be described with reference to FIG. 1. For reference, FIG. 1 is a conceptual diagram of a wave power generation system 10 according to an embodiment.

Referring to FIG. 1, the wave power generation system 10 includes an animal body 110, an exercise transmission unit 120, a power conversion unit 130, and a power generation unit 150.

The animal body 110 floats on the wave and moves in six degrees of freedom according to the movement of the wave. In detail, the animal body 110 performs a shift, surge, or sway along the x, y, and z axes according to the movement of the wave, or rotates the yaw, the pitch, and the roll. By doing this, you will have a total of 6 degrees of freedom.

For example, the animal body 110 is formed to move in accordance with the movement of the wave while floating in the wave, buoy or buoy. The animal body 110 is configured to include a coupling portion 112 is coupled to the body 111 and the exercise transmission unit 120 is formed to float in the wave.

The body 111 of the animal body 110 may be formed in various shapes, for example, may be disk-shaped or tubular, and may have various shapes, such as a cylinder, a polygonal column, a dome shape, and a disk shape. Body 111 is composed of a disk shape by the shape, shape, material, function, characteristics, effects, coupling relationship of each, but is not limited to this may be configured in a variety of shapes. In addition, the body 111 is sufficient if the material is a material that can be suspended in the wave, but is not limited thereto.

Coupling portion 112 is formed so that the exercise transmission unit 120 is coupled to the body 111, for example, it may have a ball joint shape having a motion angle of 360 degrees. Coupling portion 112 is coupled so that the animal body 110 can move freely within a certain range in a multi-direction according to the movement of the wave, the six degree of freedom of the animal body 110 to transmit the movement of the body 111 It is coupled to at least three different places. However, this is only an example, and the coupling part 112 is coupled to the exercise transmission unit 120 in various ways such that the animal body 110 can freely move within a limited range by being coupled to the animal body 110. It is possible. In addition, the position of the coupling portion 112 is not limited by the drawings, and at various positions of the body 111 may be freely flow within the predetermined range while preventing the animal body 110 from being separated from the predetermined range. The location can be changed in various ways.

In addition, the coupling part 112 has a partition wall shape formed in a vertical direction on the lower portion of the body 111. The coupling part 112 is formed perpendicular to the horizontal plane so that the animal body 110 can be actively linked to the movement of the wave, so that the force of the wave acts vertically on the coupling part 112 to the movement of the wave. This allows the animal body 110 to move more efficiently. However, this is only one example, and the coupling part 112 may allow the animal body 110 to receive the force of the wave in all directions, and the movement or energy of the wave may be efficiently transmitted to the movement of the animal body 110. It can be configured to be.

The exercise transmission unit 120 is coupled to the animal body 110, the tension transmission member 121 for transmitting the movement of the animal body 110, and the fixing member 122 for fixing the tension transmission member 121 to the seabed, etc. It includes.

The tension transmitting member 121 converts the multi-directional movement caused by the waves of the animal body 110 into a linear reciprocating motion and transmits the same to the power converter 130. For example, the tension transmission member 121 has a predetermined wire shape in which one end is coupled to the animal body 110 and the other end is connected to the power converter 130. In addition, the tension transmitting member 121 may be a wire, a rope, a chain, a sprocket, a belt, or the like. In addition to this, the tension transmission member 121 may use various means for connecting the animal body 110 and the power converter 130 and transmitting a movement.

The tension transfer member 121 is in conjunction with the six degrees of freedom movement of the animal body 110, the tension transmission member 121 can transmit in response to all the movement of the animal body 110, the most effective animal body 110 ) Can be transferred to the power converter 130. That is, the tension transmission member 121 is a part of the portion receiving the force when the animal body 110 receives the force in any direction while the animal body 110 is floating in the sea surface by the force in multiple directions by the waves. The tension transmission member 121 is pulled, and the other tension transmission member 121 connected to another part of the animal body 110 is configured to be pulled in reverse due to the tension of the one tension transmission member 121. In this way, the tension transmitting member 121 is reciprocated by the movement of the animal body 110 as the force of the wave in the animal body 110 is continuously generated in the multi-direction. That is, the tension transmitting member 121 converts the movement of the animal body 110 into a linear reciprocating motion and transmits it to the power converter 130. In addition, the tension transmitting member 121 is connected to the animal body 110 at three or more places, and prevents the animal body 110 from being separated from a certain range, and at the same time, the animal body 110 flows freely within a certain range. By doing so, it serves to deliver the kinetic energy of the animal body 110 without omission.

The fixing member 122 is installed at the seabed or elsewhere to fix the tension transmitting member 121, and serves to change the direction of the tension transmitting member 121. That is, the tension transmitting member 121 is moved within a predetermined range with the fixing member 122 as the central axis. In addition, the fixing member 122 is provided in at least one or more locations and in a plurality of positions along the longitudinal direction of the tension transmitting member 121 to fix the tension transmitting member 121 and the direction of the tension transmitting member 121. It is also equipped with a position for changing the direction of the change. For example, the fixing member 122 includes a plurality of rollers or pulleys.

The power converter 130 generates hydraulic pressure by the reciprocating motion of the tension transmission member 121 transmitted from the exercise transmission unit 120 and transmits the hydraulic pressure to the power production unit 150.

The power production unit 150 drives the generator by the hydraulic motor 134 (see FIG. 2) of the power conversion unit 130 to produce electrical energy.

Meanwhile, in the present exemplary embodiment, a plurality of tension transmitting members 121 are provided in one temporary animal body 110, and the plurality of tension transmitting members 121 are connected to one power converter 130 and a power generator 150. The form to be combined is illustrated. However, this is only an example, and the power converter 130 may be connected to each of the plurality of tension transmission members 121, or the plurality of power converters 130 may be connected to each tension transmission member 121. It is also possible. In addition, the plurality of power converters 130 may be connected to one power generator 150, or the power generators 150 may be connected to the plurality of power converters 130, respectively.

Here, the above-described embodiments illustrate that the wave power generation system 10 is installed in an onshore manner, but this is only an example, and the wave power generation according to the present embodiments may be performed in a system installed in an offshore manner. System 10 may be applied.

Hereinafter, the configuration of the power converter 130 according to an embodiment will be described in detail with reference to FIG. 2. For reference, FIG. 2 is a conceptual diagram illustrating a configuration of the power converter 130 according to an example in the wave power generation system 10 according to an embodiment.

Referring to FIG. 2, the power converter 130 includes a converter 131 and a first driver 132 for driving the hydraulic cylinder 133 in one direction by the tension transmitting member 121. do. And the restoring force transmission unit 140 for driving the hydraulic cylinder 133 in the opposite direction by the tension transmitting member 121 is provided.

The converter 131 is provided between the motion transmission unit 120 and the power conversion unit 130 and converts the movement of the tension transmission member 121 into a rotational motion or a reciprocating linear motion. For example, the transducer 131 is provided such that the tension transmitting member 121 is wound or connected, and a rotating shaft or drum for converting the reciprocating linear motion of the tension transmitting member 121 into a rotary motion or an axial motion. And the like. However, this is only an example, and substantially various means may be used as long as the movement of the tension transmitting member 121 may be converted into a reciprocating rotational motion or a reciprocating linear motion.

The hydraulic cylinder 133 generates hydraulic pressure by the kinetic energy transmitted from the tension transmitting member 121. In the drawings, the hydraulic cylinder 133 is briefly illustrated, and the detailed configuration of the hydraulic cylinder 133 will be omitted.

The first driving unit 132 is provided to drive the hydraulic cylinder 133 by the movement of the tension transmitting member 121. For example, the first driver 132 may be composed of a rack gear 302 and a pinion gear 301. However, this is only an example, and the first driving unit 132 may use various configurations capable of pressing the hydraulic cylinder 133.

The restoring force transmitting unit 140 is connected by the same tension transmitting member 121 as the first driving unit 132, and in a direction opposite to the direction in which a force is applied by the tension transmitting member 121 to the first driving unit 132. It is provided to apply a force. Here, when tension is applied to the tension transmitting member 121 according to the movement of the animal body 110, a force may be applied to the first driving unit 132 and the hydraulic cylinder 133 in one direction. However, since the tension transmitting member 121 has a form of a wire or the like, when the tension is released from the tension transmitting member 121, the force cannot be applied to the first driving unit 132 and the hydraulic cylinder 133. Thus, in the present embodiment, when the tension is released from the tension transmitting member 121, the restoring force transmitting unit 140 applies a force in a direction opposite to the tension transmitting member 121, so that the first driving unit 132 and the hydraulic pressure are reduced. Force may be applied to the cylinder 133.

The restoring force transmitting unit 140 may include an elastic unit 141 and a second driving unit 142 for driving the elastic unit 141. For example, the elastic part 141 may be a gas spring, a hydraulic spring or a pneumatic spring, and the second driving part 142 may have a rack gear 402 and a pinion gear 401 similar to the first driving part 132. Can be used.

However, the second driving unit 142 is provided on the same tension transmitting member 121 as the first driving unit 132, to apply a force to the first driving unit 132 in the opposite direction to the tension transmitting member 121. It is composed. In detail, when tension is applied to the tension transmitting member 121, the first driving unit 132 moves in one direction to apply a force to the hydraulic cylinder 133. In this case, the hydraulic cylinder 133 may be compressed or expanded. When the tension is released from the tension transmitting member 121, the second driving part 142 and the elastic part 141 operate in the opposite direction to the first driving part 132, thereby moving the first driving part 132 in another direction. Force is applied to the hydraulic cylinder 133. For example, when the rod side of the hydraulic cylinder 133 is compressed by the tension transmission member 121, the hydraulic cylinder 133 may be compressed by the restoring force transmission unit 140. Of course, unlike the above-described examples, the compression and expansion of the hydraulic cylinder 133 by the tension transmitting member 121 and the restoring force transmitting unit 140 may be operated in the opposite manner to that described above.

In addition, the restoring force transmission unit 140 serves to maintain the tensioned state by applying a tension of a predetermined size or more to the tension transmission member 121.

Here, the power converter 130 and the restoring force transmission unit 140 is provided with one so that all of the plurality of tension transmission member 121 is connected, or the power conversion unit 130 in each of the plurality of tension transmission member 121. ) And the restoring force transmission unit 140 may be provided respectively.

Next, the configuration and control method of the power converter 130 according to an embodiment will be described with reference to FIGS. 3 to 4. For reference, FIGS. 3 and 4 are diagrams for describing an operation of the power converter 130 of FIG. 2.

The power conversion unit 130 is provided on the hydraulic circuit 135 and the hydraulic circuit 135 for flowing the fluid by the hydraulic pressure generated by the hydraulic cylinder 133 and the hydraulic motor 134 for driving the power generation unit 150. ).

In the hydraulic cylinder 133, when tension is applied to the tension transmission member 121, the piston of the hydraulic cylinder 133 is pulled while the first driving unit 132 (see FIG. 2) moves in one direction. The rod side internal fluid is compressed and flows out in one direction. When the tension is released from the tension transmitting member 121, the fluid inside the blind side of the hydraulic cylinder 133 is compressed by moving the first driving unit 132 in the other direction from the restoring force transmitting unit 140 (see FIG. 2). And outflow in the other direction.

Here, in the present embodiment, the fluid inside the rod side of the hydraulic cylinder 133 is compressed by the tension transmission member 121 and the fluid inside the blind side of the hydraulic cylinder 133 is compressed by the restoring force transmission unit 140. As an example, the reverse operation is also possible.

The hydraulic motor 134 is driven by the hydraulic pressure generated in the hydraulic cylinder 133, is connected to the power production unit 150 to generate electrical energy in the power production unit 150 through the rotational energy of the hydraulic motor 134. .

The hydraulic circuit 135 drives the hydraulic motor 134 by flowing a fluid by the hydraulic pressure generated by the hydraulic cylinder 133. The hydraulic circuit 135 has a first path 310 for flowing a fluid by hydraulic pressure generated when a force is applied to the hydraulic cylinder 133 in one direction, and a force is applied to the hydraulic cylinder 133 in the other direction. It consists of a second path 320 for flowing the fluid by the hydraulic pressure generated when.

The hydraulic motor 134 is provided on the first path 310, and when the fluid flows along the first path 310, the hydraulic motor 134 is driven, thereby producing electrical energy in the power generation unit 150.

In addition, a plurality of

check valves

311, 312, and 313 are provided on the first path 310 to flow the fluid in one direction. For example, at least one

check valve

311 and 312 may be provided on a portion branched from the second path 320 on the first path 310. In addition, at least one

check valve

311 and 312 may be provided before and / or after the hydraulic motor 134 on the first path 310. However, the position and number of the

check valves

311, 312 and 313 provided on the first path 310 are not limited by the drawings.

The second path 320 is a fluid flowing from the other side of the hydraulic cylinder 133 is bypassed with respect to the first path 310, but the fluid of the second path 320 to drive the hydraulic motor 134 An end portion is provided to be connected to the first path 310 along the moving direction. In addition, at least one check valve 321 is provided on the second path 320 to control the flow direction of the fluid. Although the drawing illustrates that one check valve 321 is provided on the second path 320, this is only an example, and a plurality of check valves 321 may be provided.

136 in the figure is a tank 136 for storing fluid. The tank 136 is provided on the first path 310 and may be connected to the hydraulic motor 134 to store excess fluid.

Next, a control method of the power converter 130 according to the above-described embodiment will be described.

First, referring to FIG. 3, the kinetic energy of six degrees of freedom of the floating animal moving by the waves while floating in the waves is transmitted to the power converter 130 through the tension transmitting member 121.

Here, when tension is applied to the tension transmitting member 121, a force is applied to the hydraulic cylinder 133 in one direction by the first driving unit 132. In this case, the hydraulic cylinder 133 may be expanded or compressed by the first driving unit 132. When the tension is released from the tension transmitting member 121, the force cannot be applied to the hydraulic cylinder 133 in the first driving unit 132, but the restoring force transmitting unit 140 (see FIG. 2) may be used as the first driving unit ( A force is applied to the hydraulic cylinder 133 in the opposite direction to 132. That is, the restoring force transmission unit 140 may compress or expand the hydraulic cylinder 133.

When the piston of the hydraulic cylinder 133 is pulled by the first drive unit 132, the fluid inside the rod side of the hydraulic cylinder 133 is compressed. Then, one direction of the hydraulic cylinder 133 becomes the high pressure side and the other direction becomes the low pressure side, and fluid flows out in one direction of the hydraulic cylinder 133. The fluid flowing out of the hydraulic cylinder 133 flows in the direction of the arrow A along the first path 310. When the fluid flows along the first path 310, the hydraulic motor 134 is driven, and electrical energy is produced by the hydraulic motor 134 in the power production unit 150. Here, the fluid flows from the tank 136 to the low pressure side formed on the blind side of the hydraulic cylinder 133 by the check valve 313 provided adjacent to the other direction of the hydraulic cylinder 133 on the first path 310.

Here, since the check valve 321 provided on the second path 320 is closed, the fluid is prevented from flowing along the second path 320 by the check valve 321.

4, when the fluid inside the blind side of the hydraulic cylinder 133 is compressed by the restoring force transmission unit 140, one direction of the hydraulic cylinder 133 is at the low pressure side as opposed to the state of FIG. 3. The other direction becomes the high pressure side, and the fluid flows out from the other direction of the hydraulic cylinder 133. The fluid flowing out of the hydraulic cylinder 133 flows in the direction of the B arrow along the second path 320. Here, the check valve 313 installed adjacent to the other direction of the hydraulic cylinder 133 on the first path 310 is closed to prevent the fluid from flowing out of the hydraulic cylinder 133 to the tank 136.

In addition, the fluid flowing along the second path 320 flows most of the fluid into the low pressure side formed on the rod side of the hydraulic cylinder 133 at the portion converged with the first path 310, and the remaining fluid is the check valve 311. It flows on the first path 310 through. In addition, as the fluid flows on the first path 310, the hydraulic motor 134 is driven to generate electrical energy in the power generator 150.

In the present embodiment, the first drive unit 133 is moved in one direction by the movement of the tension transmitting member 121 to expand (or compress) the hydraulic cylinder 133 and the first drive unit by the restoring force transmitting unit 140. Since the 133 compresses (or expands) the hydraulic cylinder 133 in the opposite direction to the tension transmitting member 121, the hydraulic cylinder 133 is positively moved by the reciprocating movement of the exercise transmission unit 120 (see FIG. 1). Hydraulic pressure can be generated in the direction. And by the hydraulic pressure generated in both directions of the hydraulic cylinder 133 in this way, it is possible to continuously drive the hydraulic motor 134 and to produce electrical energy in the power production unit 150. In addition, since the fluid flows through the first path 310 both during compression and expansion of the hydraulic cylinder 133, it is possible to continuously produce electrical energy in the power production unit 150, it is possible to constantly produce electrical energy Make sure

As described above, the embodiments have been described by specific embodiments such as specific components and the like, but the embodiments and drawings are provided only to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. For those skilled in the art, various modifications and variations are possible from these descriptions. For example, the described techniques may be performed in a different order than the described method, and / or components of the described systems, structures, devices, circuits, etc. may be combined or combined in a different form than the described method, or other components. Or even if replaced or substituted by equivalents, an appropriate result can be achieved.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and all of the equivalents and equivalents of the claims, as well as the claims described below, will belong to the scope of the present invention. .

Claims

It includes a power converter including a hydraulic cylinder for generating hydraulic pressure by the six degree of freedom movement of the animal body floating in the wave,

The power converter,

When a force is applied to the hydraulic cylinder in one direction to produce electrical energy by flowing a fluid along a first path,

When a force is applied to the hydraulic cylinder in the other direction, the fluid flows through a second path for bypassing and flowing the fluid in a direction opposite to the first path, and the wave force is generated by joining the first path. Power generation system.
The method of claim 1,

A wave power generation system including a plurality of tension transfer members connected to three or more positions of the animal body.
The method of claim 2,

The tension transmission member is provided with a first drive unit and a restoring force transmission unit for driving the hydraulic cylinder,

The tension transfer member applies a force in one direction to the hydraulic cylinder when tension is applied,

The restoring force transmission unit is a wave power generation system provided to apply a force to the hydraulic cylinder in the other direction when the tension is released from the tension transmission member.
The method of claim 3,

The first driving unit converts the movement of the tension transmitting member into a reciprocating linear motion to transfer the force to the hydraulic cylinder.
The method of claim 4, wherein

The first driving unit includes a rack gear and a pinion gear.
The method of claim 4, wherein

The restoring force transmitting unit includes a second driving unit connected to the tension transmitting member and an elastic unit driven by the second driving unit to drive the first driving unit in a direction opposite to the tension transmitting member.
The method of claim 6,

The elastic portion wave power generation system including any one or more of a gas spring, a pneumatic spring, a hydraulic spring.
The method of claim 6,

The second drive unit includes a rack gear and a pinion gear.
The method of claim 3,

The first driving unit and the restoring force transmission unit are provided in each of the plurality of tension transmission member.
A floating animal moving by the waves while floating in the waves;

An exercise transmission unit including a tension transmitting member connected to the six degrees of freedom of the animal body to transmit the kinetic energy of the animal body;

A first drive unit connected to the tension transmitting member, a hydraulic cylinder for generating hydraulic pressure by the first drive unit, a hydraulic motor driven by the hydraulic pressure generated by the hydraulic cylinder, the hydraulic cylinder and the hydraulic motor A power converter including a hydraulic circuit connected to the fluid; And

A restoring force transmission unit connected to the tension transmission member and generating hydraulic pressure in the direction opposite to the tension transmission member to the hydraulic cylinder through the first driving unit;

Wave power generation system comprising a.
The method of claim 10,

When the tension is applied to the tension transmitting member, the first driving unit applies a force to the hydraulic cylinder in one direction, and when the tension is released from the tension transmitting member, the first driving part is applied to the hydraulic cylinder by a force applied by the restoring force transmitting unit. Wave power generation system provided to apply a force in the direction.
The method of claim 11,

The first driving unit includes a rack gear and a pinion gear.
The method of claim 12,

The restoring force transmitting unit includes a resilient portion and a second driving unit provided to apply a force to the first driving unit in a direction opposite to the tension transmitting member.
The method of claim 13,

The elastic portion wave power generation system including any one or more of a gas spring, a pneumatic spring, a hydraulic spring.
The method of claim 13,

The second drive unit includes a rack gear and a pinion gear.
The method of claim 10,

The hydraulic circuit,

A first path through which the fluid flows to drive the hydraulic motor when a force is applied to the hydraulic cylinder in one direction; And

A second path for flowing the fluid between one end and the other end of the hydraulic cylinder when a force is applied to the hydraulic cylinder in another direction;

Wave power generation system comprising a.
The method of claim 16,

The second path is a wave power generation system is formed so that the electrical energy is produced by the hydraulic motor through the first path by flowing the fluid discharged from the other direction to the hydraulic cylinder to the first path.
The method of claim 16,

The second path is a wave power generation system for circulating the fluid between the other end and one end of the hydraulic cylinder without introducing the fluid into the first path.
Transmitting six degrees of freedom kinetic energy of the animal moving by the waves while floating in the waves to the power converter through the tension transmitting member;

Generating hydraulic pressure in one direction when tension is applied to the tension transmission member in the power converter, and generating hydraulic pressure in another direction when the tension is released from the tension transmission member; And

Producing electrical energy by hydraulic pressure generated in the one direction and the other direction, respectively;

Control method of a wave power generation system comprising a.